2007 running rich on bank 2

03GMCYukonXL said:

You may be correct except for one thing. I don't have variable cam timing but I do have an oil pressure issue that has been present since I did the DoD delete. I'll get the p0521 code sometimes. The oil gauge goes to 0 and gives me the warning and when I give it a bit of gas it goes back up and stays that way. That too only comes about when the weather is less hot. That only happens every now and then. The service stabilitrak light and CEL for p)175 happens daily. I was told that I have the oil pressure issue because I didn't change the oil pump to a low volume high pressure one.

Why would an oil pressure issue cause a rich condition in one bank?

I have a file of the truck running at idle and the stabilitrak light comes on at some point and I give it some throttle and it goes away. Problem is, it won't let me attach the file here.

**EDIT** Side note, I have a flex fuel and was told to look at my alcohol percentage and couldn't find it, but I did discover that the flex fuel was disabled. I did not to it.

Click to expand...